Patents by Inventor Mitsuaki Yokomizo

Mitsuaki Yokomizo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Magnetic head having a notched magnetic core portion with a zero depth position offset
    Patent number: 5276575
    Abstract: Each of a pair of magnetic core halves includes a substrate and a thin magnetic metal film formed on the substrate. The substrate is notched with a winding groove. The pair of the magnetic core halves are integrally bonded to each other so that a gap filling film is formed between the facing surfaces of the thin magnetic metal films. The zero depth position of the magnetic gap which is determined by the length of the facing thin magnetic metal films is offset to a magnetic recording medium sliding surface of the magnetic head from the notching start position of the winding groove on the side of the magnetic gap. Hence, the shape of the thin magnetic metal film exposed on the magnetic recording medium sliding surface is maintained constant from the initial position to the depth zero position.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: January 4, 1994
    Assignee: Sony Corporation
    Inventors: Tomio Kobayashi, Heikichi Sato, Hideaki Ojima, Akira Urai, Akira Murakami, Yoshito Ikeda, Mitsuaki Yokomizo, Toshiyuki Okada